氮嵌入ZnO：N薄膜铁磁性的起源
Origin of Ferromagnetism in nitrogen embedded ZnO:N thin films
摘要：
用脉冲激光沉积法制备的氮嵌入ZnO：N薄膜具有明显的铁磁性。通过二次离子显微光谱和拉曼光谱实验证实了ZnO中含有氮离子，并且这些氮离子可以被认为是ZnO中的缺陷。根据实验结果，提出了一种基于Zn的完全填充d轨道中的一个电子的机制，该机制补偿了氮离子的悬挂键，并导致Zn轨道中的净自旋为1/2。这些半自旋与被缺陷捕获以形成铁磁性的局部电子强烈相关。最后，氮嵌入ZnO：N薄膜的磁性可以用束缚磁极化子模型来描述。
英文摘要：
Nitrogen embedded ZnO:N films prepared by pulsed laser deposition exhibit significant ferromagnetism. The nitrogen ions contained in ZnO confirmed by Secondary Ion Microscopic Spectrum and Raman experiments and the embedded nitrogen ions can be regarded as defects. According to the experiment results, a mechanism is proposed based on one of the electrons in the completely filled d-orbits of Zn that compensates the dangling bonds of nitrogen ions and leads to a net spin of one half in the Zn orbits. These one half spins strongly correlate with localized electrons that are captured by defects to form ferromagnetism. Eventually, the magnetism of nitrogen embedded ZnO:N films could be described by a bound magnetic polaron model.
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